Double Compton and Cyclo-Synchrotron in Super-Eddington Disks, Magnetized Coronae, and Jets

Abstract

We present an extension to the general relativistic radiation magnetohydrodynamic code HARMRAD to account for emission and absorption by thermal cyclo-synchrotron, double Compton, bremsstrahlung, low-temperature OPAL opacities as well as Thomson and Compton scattering. We approximate the radiation field as a Bose-Einstein distribution and evolve it using the radiation number-energy-momentum conservation equations in order to track photon hardening. We perform various simulations to study how these extensions affect the radiative properties of magnetically-arrested disks accreting at Eddington to super-Eddington rates. We find that double Compton dominates bremsstrahlung in the disk within a radius of $r\sim 15r_g$ (gravitational radii) at a hundred times the Eddington accretion rate, and within smaller radii at lower accretion rates. Double Compton and cyclo-synchrotron regulate radiation and gas temperatures in the corona, while cyclo-synchrotron regulates temperatures in the jet. Interestingly, as the accretion rate drops to Eddington, an optically thin corona develops whose gas temperature of $T\sim 10^9$K is $\sim 100$ times higher than the disk's black body temperature. Our results show the importance of double Compton and synchrotron in super-Eddington disks, magnetized coronae, and jets.

arXiv comment25 pages, 14 figures, 3 tables, submitted to MNRAS

References in corpus (47)

• General Relativistic Magnetohydrodynamic Simulations of Magnetically Choked Accretion Flows around Black Holes
• HARM: A Numerical Scheme for General Relativistic Magnetohydrodynamics
• Three-dimensional MHD Simulations of Radiatively Inefficient Accretion Flows
• A Possible Bifurcation in Atmospheres of Strongly Irradiated Stars and Planets
• A Global Three Dimensional Radiation Magneto-hydrodynamic Simulation of Super-Eddington Accretion Disks
• The X-ray Properties of the Most-Luminous Quasars from the Sloan Digital Sky Survey
• The evolution of CMB spectral distortions in the early Universe
• Numerical simulations of super-critical black hole accretion flows in general relativity
• Three-Dimensional General Relativistic Radiation Magnetohydrodynamical Simulation of Super-Eddington Accretion, using a new code HARMRAD with M1 Closure
• Simulations of Magnetized Disks Around Black Holes: Effects of Black Hole Spin, Disk Thickness, and Magnetic Field Geometry
• The ultraluminous state revisited: fractional variability and spectral shape as diagnostics of super-Eddington accretion
• Suppression of Bremsstrahlung and Pair Production due to Environmental Factors
• Radiation-Dominated Disks Are Thermally Stable
• Radiation driven winds from luminous accretion disks
• A scheme for radiation pressure and photon diffusion with the M1 closure in RAMSES-RT
• Global simulations of axisymmetric radiative black hole accretion disks in general relativity with a sub-grid magnetic dynamo
• Powerful radiative jets in super-critical accretion disks around non-spinning black holes
• Local Radiation Hydrodynamic Simulations of Massive Star Envelopes at the Iron Opacity Peak
• Measuring Black Hole Spin by the Continuum-Fitting Method: Effect of Deviations from the Novikov-Thorne Disc Model
• Radiative, two-temperature simulations of low luminosity black hole accretion flows in general relativity
• Harmony in Electrons: Cyclotron and Synchrotron Emission by Thermal Electrons in a Magnetic Field
• X-ray Spectra from MHD Simulations of Accreting Black Holes
• Magnetohydrodynamical simulations of a tidal disruption in general relativity
• The Stability of Magnetized Rotating Plasmas with Superthermal Fields
• Thin accretion disks are stabilized by a strong magnetic field
• Efficiency of Thin Magnetically-Arrested Disks Around Black Holes
• General Relativistic Magnetohydrodynamic Simulations of the Hard State as a Magnetically-Dominated Accretion Flow
• Hot One-Temperature Accretion Flows Around Black Holes
• Formation of Overheated Regions and Truncated Disks around Black Holes; Three-dimensional General Relativistic Radiation-magnetohydrodynamics Simulations
• Measurement of Dielectric Suppression of Bremsstrahlung
• On thermalization in gamma-ray burst jets and the peak energies of photospheric spectra
• Energy flows in thick accretion disks and their consequences for black hole feedback
• Radiation Magneto-hydrodynamic Simulations of the Formation of Hot Accretion Disk Coronae
• Magnetic pressure support and accretion disk spectra
• Super- and sub-Eddington accreting massive black holes: A comparison of slim and thin accretion discs through study of the spectral energy distribution
• Radiation pressure driving of a dusty atmosphere
• HEROIC: 3D General Relativistic Radiative Postprocessor with Comptonization for Black Hole Accretion Discs
• Three-dimensional, global, radiative GRMHD simulations of a thermally unstable disc
• Cyclo-synchrotron emission from magnetically dominated active regions above accretion discs
• Refined approximations for the distortion visibility function and mu-type spectral distortions
• Explicit-Implicit Scheme for Relativistic Radiation Hydrodynamics
• Suppression of Bremsstrahlung at Non-Zero Temperature
• Levitating atmospheres of Eddington-luminosity neutron stars
• On the role and origin of nonthermal electrons in hot accretion flows
• Relativistic corrections to the Kompaneets equation
• Leading Relativistic Corrections to the Kompaneets Equation
• Effects of Spin on High-Energy Radiation from Accreting Black Holes

Cited by in corpus (13)

• Formation of Magnetically Truncated Accretion Disks in 3D Radiation-Transport Two-Temperature GRMHD Simulations
• Can tidal disruption events produce the IceCube neutrinos?
• Spectra of Black Hole Accretion Models of Ultra-Luminous X-ray Sources
• Thermalization of large energy release in the early Universe
• Radiation Transport Two-Temperature GRMHD Simulations of Warped Accretion Disks
• GRRMHD Simulations of MAD Accretion Disks Declining from Super-Eddington to Sub-Eddington Accretion Rates
• General Relativistic Radiation Magnetohydrodynamic Simulations of Thin Magnetically Arrested Disks
• Improved calculations of electron-ion Bremsstrahlung Gaunt factors for astrophysical applications
• The double Compton process in astrophysical plasmas
• H-AMR FORGE'd in FIRE I: Magnetic state transitions, jet launching and radiative emission in super-Eddington, highly magnetized quasar disks formed from cosmological initial conditions
• Dissecting the Compton scattering kernel I: Isotropic media
• Comparison of numerical methods for computing the repeated Compton scattering of photons in isotropic media
• Slim accretion disks: theory and observational consequences